PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5521Valve,gate

Hunt Valve Company, Inc. · NSN 4820-01-328-6507 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-328-6507 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-328-6507. Primary manufacturer part number: 5521.
Features
  • Valve,gate — FSC 4820
  • Bonnet Attachment Method: BOLTED
  • Valve Operation Method: MANUAL
  • Bonnet Type: OUTSIDE SCREW-YOKE
  • Material: NICKEL ALLOY SEAT
  • Inlet Relationship with Outlet: IDENTICAL
  • Pressure Class: ERR-060
  • Stem Type: RISING
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Nickel Alloy Seat construction
General Description

The Valve,gate, cataloged under National Stock Number 4820-01-328-6507, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-328-6507
Primary Part Number5521
Item NameValve,gate
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHunt Valve Company, Inc.
StatusACTIVE
Bonnet Attachment MethodBOLTED
Valve Operation MethodMANUAL
Bonnet TypeOUTSIDE SCREW-YOKE
MaterialNICKEL ALLOY SEAT
Inlet Relationship with OutletIDENTICAL
Pressure ClassERR-060
Stem TypeRISING
Furnished Items and Quantity1 HANDWHEEL
MaterialNICKEL ALLOY STEM
MaterialCOPPER ALLOY DISK
MaterialCOPPER ALLOY BODY
Flange Diameter7.500 INCHES IN
Bolt Hole Quantity8
Valve Size2.500 INCHES IN
Flange Face DesignPLAIN
Face to Face Distance6.000 INCHES IN
Connection TypeFLANGE, ROUND W/HOLES
Operating Pressure and Type250.0 POUNDS PER SQUARE INCH (PSI) WATER AND OTHER LIQUIDS MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-100-04962X627B INTERCHANGEABLE
Cup,tapered Roller Bearing
Napco International Llc Dba Napco International Inc
5975-00-100-8759 INTERCHANGEABLE
Box Connector,electrical
5330-00-290-1168335216 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
5962-00-469-47615521 INTERCHANGEABLE
Microcircuit,linear
Satcon Electronics Custom Hybrid Products Div
5935-00-502-6234552-1 INTERCHANGEABLE
Connector,plug,electrical
Microwave Devices Inc
2920-00-594-241555-21 INTERCHANGEABLE
Lead,ignition,engine
Rbc Transport Dynamics Corp Div Rbc Transport Dynamics
6505-00-684-8737 INTERCHANGEABLE
Penicillin G Procaine Suspension
6645-00-868-12466800791 INTERCHANGEABLE
Timer,sequential
Hoyt Corporation
5915-01-138-0649119-1029-00 INTERCHANGEABLE
Filter,band Pass
Tektronix, Inc.
4820-01-329-3520 INTERCHANGEABLE
Cap,valve
Cross-Reference Index
Part NumberManufacturer
NB25025-E-MAC-2 1.2IN Montreal Bronze Ltd Dba Les Fonderies De Bronze Montr?al (CAN)
NB25025-E-MAC-2 1/2IN Pima Valve, Llc (USA)
5521 PRIMARY Hunt Valve Company, Inc. (USA)
NB25025-E-MAC Pima Valve, Llc (USA)
Related Parts
3110-00-100-0496INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
2X627B
5975-00-100-8759INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
5330-00-290-1168INTERCHANGEABLE
SEAL,PLAIN ENCASED
335216
5962-00-469-4761INTERCHANGEABLE
MICROCIRCUIT,LINEAR
5521
5935-00-502-6234INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
552-1
2920-00-594-2415INTERCHANGEABLE
LEAD,IGNITION,ENGINE
55-21
6505-00-684-8737INTERCHANGEABLE
PENICILLIN G PROCAINE SUSPENSION
6645-00-868-1246INTERCHANGEABLE
TIMER,SEQUENTIAL
6800791
5915-01-138-0649INTERCHANGEABLE
FILTER,BAND PASS
119-1029-00
4820-01-329-3520INTERCHANGEABLE
CAP,VALVE
5365-01-355-5182INTERCHANGEABLE
SPACER,SLEEVE
233816
5999-01-581-8681INTERCHANGEABLE
CLIP,ELECTRICAL

Frequently Asked Questions

What is NSN 4820-01-328-6507?

NSN 4820-01-328-6507 is a Valve,gate, manufactured by Hunt Valve Company, Inc., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-328-6507?

NSN 4820-01-328-6507 has 4 cross-referenced part numbers: NB25025-E-MAC-2 1.2IN (Montreal Bronze Ltd Dba Les Fonderies De Bronze Montr?al), NB25025-E-MAC-2 1/2IN (Pima Valve, Llc), 5521 (Hunt Valve Company, Inc.), NB25025-E-MAC (Pima Valve, Llc).

What NSN replaces 4820-01-328-6507?

There are 12 known substitutes for 4820-01-328-6507: 3110-00-100-0496, 5975-00-100-8759, 5330-00-290-1168 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5521?

Key specifications for 5521: Bonnet Attachment Method: BOLTED; Valve Operation Method: MANUAL; Bonnet Type: OUTSIDE SCREW-YOKE; Material: NICKEL ALLOY SEAT. 18 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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